Cavity?: A cavity is a hole in something. Sounds like you have a an issue with your glands/ducts in the floor of your mouth, like a salivary stone, but your description is inconsistent. Is it in your gums? In your lower teeth? Or under your tongue? Post a photo or see your dentist for more help.
Answered 1/18/2014
4.6k views
Ulcer: You may have an ulcer in that area. If it does not resolve in 2 weeks time see your physician to have it looked at.
Answered 1/9/2014
4.6k views
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